Finite Element Analysis of11.00R20All Steel Radial Truck Tire
|School||Qingdao University of Science and Technology|
|Course||Polymer Chemistry and Physics|
|Keywords||radial tire nolinear FEA ABAQUS steady rolling laterial properties|
By means of ABAQUS code,a nonlinear FEA software,taking the non-uniformityof tire material,the nonlinearity and incompressibility of rubber material,the anisotropyof cord/rubber composite,the geometric nonlinearity of large deformation in tire andthe nonlinear large deformation contact between tire and rim or ground intoaccount,nonlinear axisymmetric FEA models and three-dimensional FEA models of11.00R20all steel radial truck tire were set up based on the actual structure.According to the uniaxial tensile test results for each rubber material actually usedin the tire,this paper select the YEOH model and material parameters were obtained bysoftware according to least square method.The cords material parameters werespecified by the equivalent stress-strain curves in uniaxial tension,and material modelwas simulated by rebar model.Based on the FEA model,firstly we simulated the contact procedure of bead-rimand inflation,then we getted the deformation of tire,and also getted the sectional widthB ’and diameterD ’under inflation.Compared with the measured values,the valueswere with the tolerance of national regulations.Thus,it was shown that the FEA modelswere reasonable.We analysized the status undergoing force of the skeleton structureand rubber structure of bead in the tire.The smooth tread tire contacting with road in the standard pressure load wassimulated.The footprints of smooth tread and the stresses of belts and carcass at staticgrounding were obtained,the impact of the different pressure on the wrapping on thetread, loading capacity and radial stiffness was studied,and obtained contact area andcontact pressure in the footprint patch with different pressure.The impact of differentdeflection on reaction force,and obtained contact pressure in the footprint patch withdifferent deflection.On the basis of static grounding,steady rolling was simulated,andcontact stress at motion,traction different free rolling were obtained.When the freerolling was80km/h,the variations of free rolling radius and contact stress with differentfriction coefficient. On the basis of free rolling FEA model of tire,the laterial property of camber tirewas investigated.Through changing slip angel of tire,the deformation configurations ofthe lowest section of tire with different slip angels were obtained.Footprint of contactpatch,the relationship between lateral forces,aligning moment and slip angel werestudied.According to the FEA models,studied stiffness coefficient of tire with differentinflation pressure,verified that stiffness decreased with the increase of pressure.Theshare rate of pressure between belts and carcass,reinforced layer and carcass understandard pressure and standard load were given.